Yes I have thought about that my dads a mason and has a grout mixer and the drill for it. I have a question though it is hot here in the desert and I had a young rooster die yesterday and another today is the ferment causing them to heat up because the first couple days I put some of the horses alfalfa in the mix then stopped because I realized alfalfa is hot anyways The chickens are not sick but acting hotter then usual?If you really have a lot to mix... in a deep container like a trash can or such, you might consider getting one of those log drill driven stirring rods that they use for mastic/grout/paint. Put it in a high torque, low speed drill and then just move it up and down through the contents in the barrel till everything is homogeneous. That's what I'd try to do anyway... I'm all about easier is better.